Prevalence and factors associated with overweight in children under 5 years in West African countries.

Background: Overweight is a risk factor for non-communicable diseases and is affecting an increasing number of children worldwide. The objective of this study was to measure the prevalence and related factors to overweight among children under 5 years in five West African countries.

Methods: This study was a secondary analysis of nationally representative cross-sectional data. These data were drawn from Demographic and Health Surveys (DHS) from five countries in the West African region (Benin, Guinea, Mali, Nigeria, and Togo) from 2015 to 2018.Continuous quantitative data were categorized and all analyses were weighted according to the probability that each participant was selected in the sample. Children under 5 years of age were the study population. Multilevel logistic regression was used with Stata 16.0 software.

Results: The total sample size for the analysis was 38,657 children. The pooled prevalence of overweight among children under 5 years of age in the five countries was 3%. Guinea had the highest prevalence (6%) compared to the other countries, which had a prevalence of 2%. The likelihood of being overweight was higher among children aged 0-6 months (adjusted odds ratio [AOR] = 3.09; 95% confidence interval [CI] [2.41-3.95]), who had a high birth height (AOR = 1.64; 95% CI [1.29-2.09]), whose mothers were overweight (AOR = 1.35; 95% CI [1.09-1.68]), who lived in households with fewer than five members (AOR = 1.19; 95% CI [1.00-1.46]), or who lived in Guinea (AOR = 2.79; 95% CI [1.62-4.79]).

Conclusion: This study showed that overweight concerns few children under 5 years of age in West Africa. However, it does exist, and its prevalence could likely increase if its modifiable factors (maternal overweight, household size, and height at birth) are not taken into account in nutritional interventions.